Water heater



G. A; BRY'AN WATER HEATER Filed July 16, 1929 ATTORNEY Patented Oct. 11, 1932 enonen A. BRYAN, or PER-u, INDIA-NiL ASSIGNOR 'ro BRYAN STEAMQICORBORATION, A

P i CORPORATIONOENEW-MEXICO My invention has reference to water'heating coils of-the type thatarecommonly used in conjunction withgdomestic heating sys- V i terns, a purpose of the invention beingto provide a construction-in-which the coilsa re adapted to occupy a minimum of space and are readily and quickly inserted or replaced; In the method of indirect heating commonly employed in conjunction'with heating sys-i tems in Which the heating-coils ofth'e domes-p tic water supply are" heated by the {medium used in transferring the heaugenerated-in' the furnace to the heat radiator units throughout the building; it has beenthe coin 'monpractice todivert a portion: of'the heat transfer medium through coils immediately associated with the domestic water'heatin g" coils; "Some of theheat carried by" the heat transfer 7 medium through the coils associated with thewater heating coils isutrans-t ferred to the water in the domestic-lwater heating coils. In certainprionconstructions V forexample, that shown in my copending ape plication which became Patent No. 1,7 455,401, February 4', 1930, the domestic water heating coils in steam and hot" Water systems have been placed in, direct contact with the heat transfer medium in the boiler by insertingthe domestic water heating "coils i withina water space of the boiler. ---By this method, the eificiency ofthe transfer ofheat to theld-ornestic water is greatly increased. T'j'However, this method requires an; expensive construction in that a large expensiveheader is required;-

which, when the watertubes are in place,

attaching the tube ends to the header; 1 Other advantages will appeal-from the description; of theillustrated embodiment of the inven tion.

Specifically, Ilemploy a construction-which his. set-elf 378,628; I v

consists i of a circular header. i and 'a' plurality of' U-shape tubes. Each tube occupies sub stantiallyadiametral plane of; the header and is in symmetrical angular displacement with respect to the others, the tubes being thereby nesteditogether so as to constitute diagonals of regular polygon; In the construction shown, there1are three tubes and-they there l fore constitute diagonalsiofa hexagon The ends of the tubesconstituting the inlet there-1 branch from a single 'inlet 'and outlet feeder;

which feeders are connected to the circularhead'er by a bell joint; Theopening inva' header in: adizance of the bell ointisidri-lled" greatest diameter to adiameter equal to: the

offthefi'areof the bell: Into this opening;

azfitting havingr a ta per correspondingtothe taper'of the bell is threaded, and presses the ,flarefof the tube in? contact with the c oinple mentary surface in-the headefa. c-Thefitting,

is hollow to permitthe how of water =therethrough. Into the-openings formed in "the.

header,- in the end opposite tothat' 'fr'omwhich the feeder tubeseXtend', inletja'nd-outlet pipes or nipples are threaded, the, opening being tapped for that-purpose; 1Theecirculanhead;

ems; providedwith threadsyibye meansnof '66 to, and the outlettherefrom.are united toor which it maybe screwed intoa tapped open ing intheboiler. I The diameter of the p'olygr; onal figure of-which'the tube'sconstitute diag-i' onals-is lessthan the diameter of the circular- :headerso that ,tlie'ccils may'p'ass through the opening provided forthe header, 1 a Lshall 11ow. describe one embodimentIofjIn-y invention in connection, :With; the accompany-1 ingzdrawingin which? Fig. -1 is a side elevation oii a water-heating? coil-constructed in accordance witlrimy -invention;-

Fig.2-is anelevation of the same, p'arts of the header being broken awayito show the-in-t ternal. construction thereof and the ing rotatedthrough an angle bf, qrela1 f tiverto the position" shown Fig; 1 z i. Fig. 3 is an end View of the coils; and

Fig. 4' is the section taken on the line i of Fig. 2; A

the illustrated embodiment-oi tion, a plurality offU-shapetubesL shown 111 I tapered flare on said feeder ends engaging the tapered surfaces joining the sections of said openings, threaded fittings having tapered extensions adapted tobe screwed into the sections of greater diameter of said openings, the tapered extensions on said fittings pressing the flare 011 said feeder ends in contact with the tapered surfaces in said openings, and inlet and outlet water pipes entering the header openings at the outer face and being secured therein. 7

5. In a heat-exchange device, the combination of a group of substantially U-shape rebent nested heat-transfer tubes disposed in radial planes in angular displacement with respect to each other about a common longi-- tudinal axis, with all of the said tubes equally radially spaced from this common axis, the bends of these tubes being successively nested one within another so as to cross each other, two feeder ends each of which supports and unites all of the said tubes in common at their respective opposite ends, and an individual header carrying both of the said feeder ends and having an inlet communicating with one of the feeder ends and having an outlet communicating with the other feeder end.

6. In a heat-exchange device, the combination of a group of three substantially U-shape rebent nested heat-transfer tubes disposed in radial planes in equally angular circular dis-- placement with respectto each other about a common longitudinal axis, so that all of the said tubes are equally radially spaced from this common axis, the U-bends of these tubes being successively nested one within another so as to cross each other, two feeder ends each of which supports and unites all of the said tubes in common at their respective opposite ends, and an individual header which supports both of the said feeder ends and having an inlet opening communicating with one of the feeder ends and having an outlet opening communicating with the other feederend.

7 A water heater comprising a header connectable to a boiler and having an inlet and an outlet passage therein, a cluster of U- shaped tubes connected to the header at the inner face thereof and being secured thereto with their inlet ends in communication with the header inlet passage and with their outlet ends in communication with the header outlet passage, the said inlet andv outlet passages of theheader at the outer face thereof being connectable respectively. to inlet and outlet water pipes, each tube occupying sub stantially adiametral plane of the header andsuch'tubes being in symmetrical angular displacement with respect to; one another, the-bends of :these tubesbeing successively nested one Within another so as :to cross each other, the said header being. individual to the said cluster of tubes. v r

8.:In a heat-exchange device, the combination of a cluster of U-shaped nested heattransfertubes disposed in angular displace- I V ment with respect to each other about a common longitudinal axis and having U-bends successively nested one within another, and a header individualto the said cluster unit-v ing the ends of and supporting'all of the said U-shaped tubes in the cluster, the said header having an inlet passage in communication in multiple distributing relation with the inlet ends'only of the said tubes, and the said header having an outlet passage in communication in multiple uniting relation with the outlet ends only of the said tubes, the said header being connectable to the wall-of a containerwith the saidcluster of tubes projecting at the inner sidethereof and with the outerface of'the header exposed at the outer side of said vwall, and the said inlet and outletpa'ssages ofthe header having openings throughthe outer face of the header to which pipes arerespectively connectable.

type,the;combination -of a group of more than two substantially U-shaped rebent nested heat-transfer tubes disposed in an axially elongated cluster in radial planes in symmetrically angular' circular displacement withvrespect-to each other about a common longitudinal axis, the elongated side membersof'the said U-shaped tubes being straight and being equally radially spaced from the said common axis in any transverse plane normalto said axis, these tubeseall having substantially semi-circular U-bendsof the same radius and the, U-bends of these tubes being successively nested one within another so as to cross each other in line with said axis, and a header device connectable to a boiler so as to be exposed at the outside thereof and with the said elongated cluster of tubes projecting into the boiler, the said header device uniting the ends of and supporting all of the said U-shaped tubes in the cluster, the said header device at the outer face thereof having an inlet connectable to a water inlet pipe and having an outlet connectable to a water outletpipe, thesaid header device having an inlet passage leading from its said inlet and the inner portion of this passage being'in communication in multiple relation with the inlet ends only of the 10c" 9, ,In-a water, heater of the heat-exchange saidj tubes, and the said header deirice having 7 an outletpassage the inner portion of which fis in communication in multiple relation'with the outlet ends only ofthe said tubes and leading to its said outlet, so that thereby the water whichis being heated maylflow in parallelrelation through all of'the saidnested U shaped tubes grouped in the said cluster. 10. Ina Water heaterofi the heat-exchange type, the combination ofa group of three if U-shaped rebent nested heat-transfer tubes disposed in anaxially elongated cluster. in

' radial planes in symmetrically angular circ'ular displacement with respect to each other about aflcommon longitudinal'axis,'the elone gated side members of the said U-shaped tubes beingequally radially spaced from this i i common axis in any transverse plane normal tosaid axis,,these tubes all having substan- 31 tially semi-circular "U-bends of the same radius and the Uebends of, these tubes being Y successively nested one within another so as I to cross each'other 1n line with said arms, and

aheader connectable to a boiler'with the said $5 elongated cluster of tubes projecting into the boiler, the'saidheader comprising-inner headermeans forsupporting and uniting in 7 multiple communicating relation all of the C said tubes in common at their respective op- 39 posite ends only,and the said header further comprising an outer header part connected to said inner header meansand'having an inletconnectable to awater inlet pipe, the said inlet beinginfcommunicationin multiple rea 33 lation with the inlet ends only ofthe said tubes through the said inner header means, and the said-outer header part having an outlet connectable to a Water outlet pipe, the said outlet being in communication in multiple relation with the outlet ends only of the said 7 tubes through ,the'saidinne'r header means,

so that thereby the water which is being heated may pass from the header inlet 'in parallel relation through all of the said nested U-shaped tubes grouped in' the said cluster and then pass to the header outlet. I 1 In'witness whereof, I hereunto subscribe my signature. V V GEORGE A. BRYAN; 

